Back for brake-shoes.



W. H. MALOY.

BACK FOR BRAKE SHOES.

APPLIOATION FILED OCT. 23, 1911 Patented Mar. 12, 1912.

the back is embedded. The 100 UNITED STATES PATENT OFFICE.

WILLIAM H. MALOY, OF SUFFERN, NEW YORK, ASSIGNOR '10 EDWARD FALLOWS,

OF NEW YORK, N. Y.

BACK FOR BRAKE-SHOES.

Specification of Letters Patent.

Patented Mar. 12, 1912.

To all whom it may concern:

Be it known that I, WILLIAM H. MALOY, a citizen of the United States,and a resident of Sufl'ern, in the county of Rockland and State of NewYork, have made and invented certain new and useful Improvements inBacks for Brake-Shoes, of which the following is a specification.

My invention relates to steel backs for brake shoes formed from a singlepiece of metal by'bending and shaping a suitable blank, the same beingdesigned to be placed in a mold, in position to become embedded in therear surface or back of a brake shoe, as molten metal is pouredthereinto, the object thereof beingto provide an improved steel back ofthe type referred to having features of constructlon and advantage ashereinafter disclosed, and to provide a blank from which such a steelback may be formed by suitable bending and shaping operations, all ashereinafter defined in the concluding claims.

'My improved steel back and blank are illustrated in the drawingaccompanying and forming a part of this application.

wherein:

Figure 1 is a view illustrating the manner in which blanks for the backsare cut from a sheet or plate of wrought metal such as mild steel; Fig.2 is a view showing a section cut from the plate shown in Fig. 1, andwhich section may be divided to form several back blanks; Fig. 3 is aview showing a single back blank, and, Fig. 4 is a view showmg inperspective a steel back formed from the blank shown in Fig. 3.

The blank from which my improved steel back is formed comprises oblongside portions 5-5, of approximate rectangular form connected with oneanother by across piece 6 extending between the sides and located at orabout their middle as shown. This cross piece is bent and forced out ofthe plane of the sides to provide a projecting loop or lug 7 in thecompleted back shown in Fig. 4, the sides or ends 8 of which areabout-at right angles to the plane of the sides as shown, the sidesthemselves being curved as shown to conform, approximately, to :thecurvature of the brake shoe in which 7 serves as a mean's; ,forattaching the bra e shoe to a brake-head by means of a key, as will beunderstood.

cent the-ends of the cross piece 6 where it joins the sides 5, as shownat 10, these recesses extending from the inner ed e of the sides intoand part Way across t e same, the form of which recesses, while shown assemi-circular may be varied as desired.

The provision of recesses at the place where the edges of the sides 5and cross piece 6 meet prevents the formation of cracks, or unduestraining of the metal as the cross piece is bent to form the 100 or lug7, and results in a construction in w 'ich the bases of the ends 8 arebrought into a position between the edges and near the middle of thesides, and whereby the ends of the lu do not spring from the inneredges'of t e sides of the back as is the case in former types of steelbacks. More space is also secured between the lower portion of the ends8 of the lug, the side portions 9 of the finished back are broughtcloser together than were such recesses not provided, and a greaterlength of cross piece from which to form the lug is secured than informer blanks.

The blanks from which the steel back is formed may be produced in anyway. They 'are, however, preferably out from a long narrow strip ofsheet metal with a minimum wasteof material in accordance with themethod of cutting blanks for brake shoe backs disclosed and claimed inthe patent to Harry Jones, No. 995,011, June 13th, 1911.

.Fig. 1 shows such a strip, and the lines appearing thereupon indicatethe path along which the sheet is cut, as by means of suitable cuttingdies. Fig. 2 shows a section cut from the sheet, which is subsequentlydivided to form individual blanks such as are shown in Fig. 3.

In forming blanks in accordance with the method above referred to,projections 11, corresponding in outline with the recesses 10, aresecured at the ends of the side 7 portions 5, which projections serve toanchor the ends of the sides.9 of the finished back more firmly in theback of the cast metal bodyof the shoe as the same is formed, and toprevent the end portions of the body of the shoe from shiftinglongitudinally and becoming detached, should the shoe be cracked orbroken in use, it being not uncommon in practice for the cast metal bodyportion oi a brake shoe tobe cracked or roken transversely, in whichevent, if the parts of the shoe be not securely held or bound together,the end portions are liable to become detached and fall from the shoe,and result in serious accident. Having thus described and explained myinvention,I claim and desire ,to secure by Letters Patent 1. A blank fora backfor a brake shoe having two' side portions and a cross-pieceextending between them whereby they are joined together, said blankhaving recesses adjacent the ends of said cross-piece and extending intosaid sides.

2. A blank for a back for a brake shoe having two similar side portionsand a crosspiece extending between them whereby they are joinedtogether, said blank havingrecesses adjacent the ends of saidcross-pie0eand extending into said sides, and projections corresponding inoutlinewith said recesses at the ends of said side portions.

3. A blank for a back fora brake .shoe having two side portions and across-piece extending between them whereby they are joined together,said blank having two recesses ad acent one end of the cross-piece andlocated one upon either side of said cross-piece and extending into oneof the sides aforesaid of said blank. j

4. A back to beembedded in a brake shoe,

of October, A.

the same comprising two side portions and a projecting loop or lugformed integrally with said sides and whereby they are connected withone another, the bases of the end portions of said lug joining with theside portions of said blank between the side edges thereof.

5. A back to be embedded in. a brake shoe, the same being formed from asingle piece of metal and comprising two side portions and a projectingloop orlug extending from one of said sides to the other, said lugspringing from the middle portion of said sides and midway between theside edges thereof, the base portions of the ends of said lug extendinglongitudinally of the shoe.

6. A back to be embedded in a brake shoe, the same having two parallelside portions separate fromone another and a projecting loop locatedatthe middle portion of said sides whereby they are joined together, andprojecting lugs lying in the plane of said sides and located at the endsof said side portions.

7 A back to be embedded in a brake shoe, the same having substantiallyparallel sides separate from one another and a projecting loop locatedat the middle portion-of said sides whereby they are joined together,and lugs at the ends of said side portions, said lugs lying in the planeof said sides and extending toward one another.

Signed at Sufl'ern, in the county of Rockland and State of New York,this 17th day WILLIAM H. MALOY. Witnesses:

H. P. WINGERT, F. J. SEYMOUR.

